Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Progressive Muscle Relaxation

Stress [ For more on 'Stress' go here: http://www.braingle.com/mind/534.html ] can cause all sorts of problems for us in our daily lives. Not the least of which is a decreased ability to think productively and creatively. Progressive muscle relaxation is a widely used method of relaxation. It can be used to reduce stress whenever you have a few moments of free time.

This method works in two steps. The first step is to deliberately tense a certain muscle group for about 8 seconds. Notice how it feels for the muscle to be tense. Now, fully relax the muscle and pay attention to the difference in feeling. Keep this muscle relaxed for about 15 seconds before moving on to the next muscle group. With the knowledge of what the two states feel like, you can learn to relax muscles at the first signs of tension. Once you can achieve physical relaxation, mental calmness will follow.

Choose a quite place to practice and wear comfortable clothing. Sit comfortably or lie down. Keep in mind that if you lie down, you may fall asleep. You should tense and relax one muscle group at a time. The most popular sequence is listed below. If you are left-handed you may want to reverse the sides.

1. Right foot
2. Right lower leg and foot
3. Entire right leg
4. Left foot
5. Left lower leg and foot
6. Entire left leg
7. Right hand
8. Right forearm and hand
9. Entire right arm
10. Left hand
11. Left forearm and hand
12. Entire left arm
13. Abdomen
14. Chest
15. Neck and shoulders
16. Face
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For more mind exercises: http://www.braingle.com/mind/